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  <title>Sort the entries by key</title>

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</div><hr /><div id="arrayobject.ksort" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ArrayObject::ksort</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.2.0)</p><p class="refpurpose"><span class="refname">ArrayObject::ksort</span> &mdash; <span class="dc-title">Sort the entries by key</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-arrayobject.ksort-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>ArrayObject::ksort</strong></span>
    ( <span class="methodparam">void</span>
   )</div>

  <p class="para rdfs-comment">
   Sorts the entries by key, maintaining key to entry correlations. This is
   useful mainly for associative arrays.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-arrayobject.ksort-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-arrayobject.ksort-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   没有返回值。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-arrayobject.ksort-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3892">
    <p><strong>Example #1 <span class="function"><strong>ArrayObject::ksort()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$fruits&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"d"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"lemon"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"a"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"orange"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"b"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"banana"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"c"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"apple"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$fruitArrayObject&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">ArrayObject</span><span style="color: #007700">(</span><span style="color: #0000BB">$fruits</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$fruitArrayObject</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">ksort</span><span style="color: #007700">();<br /><br />foreach&nbsp;(</span><span style="color: #0000BB">$fruitArrayObject&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$key&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"</span><span style="color: #0000BB">$key</span><span style="color: #DD0000">&nbsp;=&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />}<br />&nbsp;</span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
a = orange
b = banana
c = apple
d = lemon
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-arrayobject.ksort-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="arrayobject.asort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::asort()</a> - Sort the entries by value</span></li>
    <li class="member"><span class="methodname"><a href="arrayobject.natsort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::natsort()</a> - Sort entries using a &quot;natural order&quot; algorithm</span></li>
    <li class="member"><span class="methodname"><a href="arrayobject.natcasesort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::natcasesort()</a> - Sort an array using a case insensitive &quot;natural order&quot; algorithm</span></li>
    <li class="member"><span class="methodname"><a href="arrayobject.uasort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::uasort()</a> - Sort the entries with a user-defined comparison function and maintain key association</span></li>
    <li class="member"><span class="methodname"><a href="arrayobject.uksort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::uksort()</a> - Sort the entries by keys using a user-defined comparison function</span></li>
   </ul>
  </p>
 </div>


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